percentage of numbers in the source
percentage of numbers in the target
absolute difference between number of numbers in the source and target sentence normalised by source sentence length
percentage of source words that contain non-alphabetic symbols
percentage of target words that contain non-alphabetic symbols
ratio of percentage of tokens a-z in the source and tokens a-z in the target
average unigram frequency in quartile 1 of frequency in the corpus of the source language
average unigram frequency in quartile 2 of frequency in the corpus of the source language
average unigram frequency in quartile 3 of frequency in the corpus of the source language
average unigram frequency in quartile 4 of frequency in the corpus of the source language
average bigram frequency in quartile 1 of frequency in the corpus of the source language
average bigram frequency in quartile 2 of frequency in the corpus of the source language
average bigram frequency in quartile 3 of frequency in the corpus of the source language
average bigram frequency in quartile 4 of frequency in the corpus of the source language
average trigram frequency in quartile 1 of frequency in the corpus of the source language
average trigram frequency in quartile 2 of frequency in the corpus of the source language
average trigram frequency in quartile 3 of frequency in the corpus of the source language
average trigram frequency in quartile 4 of frequency in the corpus of the source language
percentage of distinct source unigrams seen in a corpus of the source language (in all quartiles)
percentage of distinct source bigrams seen in a corpus of the source language (in all quartiles)
percentage of distinct source trigrams seen in a corpus of the source language (in all quartiles)
target sentence LM probability
target sentence LM perplexity
average number of translations per source word in the sentence (threshold in giza1: prob > 0.01)
average number of translations per source word in the sentence (threshold in giza1: prob > 0.05)
average number of translations per source word in the sentence (threshold in giza1: prob > 0.1)
average number of translations per source word in the sentence (threshold in giza1: prob > 0.2)
average number of translations per source word in the sentence (threshold in giza1: prob > 0.5)
average number of translations per source word in the sentence (threshold in giza1: prob > 0.01) weighted by the frequency of each word in the source corpus
average number of translations per source word in the sentence (threshold in giza1: prob > 0.5) weighted by the frequency of each word in the source corpus
average number of translations per source word in the sentence (threshold in giza1: prob > 0.1) weighted by the frequency of each word in the source corpus
average number of translations per source word in the sentence (threshold in giza1: prob > 0.2) weighted by the frequency of each word in the source corpus
average number of translations per source word in the sentence (threshold in giza1: prob > 0.5) weighted by the frequency of each word in the source corpus
absolute difference between number of periods in source and target sentences
absolute difference between number of commas in source and target sentences
absolute difference between number of : in source and target sentences
absolute difference between number of ; in source and target sentences
absolute difference between number of ? in source and target sentences
absolute difference between number of ! in source and target sentences
absolute difference between number of periods in source and target sentences normalised by target length
absolute difference between number of commas in source and target sentences normalised by target length
absolute difference between number of : in source and target sentences normalised by target length
absolute difference between number of ; in source and target sentences normalised by target length
absolute difference between number of ? in source and target sentences normalised by target length
absolute difference between number of ! in source and target sentences normalised by target length
percentage of punctuation marks in source sentence
percentage of punctuation marks in target sentence
absolute difference between number of punctuation marks between source and target sentences normalised by target length
source sentence LM probability
source sentence LM perplexity
nmber of tokens in target phrase
number of tokens in source phrase
number of tokens in the source / number of tokens in the target
number of tokens in the target / number of tokens in the source
average target token length
average source token length
average number of occurrences of the target word within the target sentence
percentage of unaligned words
percentage of words with more than 1 aligned words
average number of aligned words per word
percentage of content words in the source sentence
percentage of content words in the target sentence
percentage of verbs in the source sentence
percentage of verbs in the target sentence
percentage of nouns in the source sentence
percentage of nouns in the target sentence
percentage of pronouns in the source sentence
percentage of pronouns in the target sentence
ratio of percentage of content words in the source and target
ratio of percentage of nouns in the source and target sentences
ratio of percentage of verbs in the source and target sentences
ratio of percentage of pronouns in the source and target sentences